ML20009G217

LER 81-035/01T-0:on 810622,leakage Through Several Points in Recombiner Sys Resulted in 3-h Release Through Unit 3 Reactor Bldg Vent.Caused by Loss of Negative Pressure. Leak Points Isolated by Valve Closure or Pipe Capping

ML20009G217
Person / Time
Site:	Peach Bottom
Issue date:	07/06/1981
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20009G211	List: ML20009G210 ML20009G217
References
LER-81-035-01T, LER-81-35-1T, NUDOCS 8108030438
Download: ML20009G217 (1)

Text

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I $ t,0 61 DOCKET NUMSER tdi t>9 LVENT DATE 14 REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h lo12! I rn11cuinn ' nit e hn t ani.,n ana resulting trin nf a reenmhiner mnchanical I i o 13 ! I enmnressor. oressure in comoressor suction line increased to oositive I icia!I valve. teakage thenugh several noints in reenmhiner system resul ted in a ]

Ossi L '4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> release throech Unit ~4 reactor building vent. Total release was l 10 lG 1 L.t a' cul ated at 11 f4 corine_ riv- rniat-a eni-ame, nuer o any_,nnrina more i IO 171 l within Tech. Socc. limits. Anal ysis of roof vent iodine and oarticulate l I O la i l indicated no increase in release rate durina aaseous activity soikes. - -

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SYSTE M CAUSE CAUSE COMP. VALVE CCOE CODE SUSCODE COMPONENT CODE SveCODE SU8 CODE lo696 1 4 l M ! B l@at W@ l Zi@ l V ! A ll IV I E IX l@ l Fl@ l Pl@

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31 10 1 32 aCT' Ore ruTun' EFFECT SHu T O CV.N ATT ACHME N T NPHD-4 PRIME COMP. COMPONENT TAK E fe ACTION ON PL ANT METHOO HOURS - suttMt ITED FOHM huat SUPPLIE R MANUFACTURER IX  !@lZ l@ l Zl@ l030l010l l Y l@ ]4gY l@ lZ l@ lZ l9 ]9 l9 l@

J3 J4 JS IJ.6@ 1/ 4Q 44 43 44 af CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h j iio! l Event was caused by leakage tnrough several points in the recombiner l

, i ; i j 1 system when negative pressure was lost. Leak points were isolated by l y,i,!l valve closure or pipe capping. Following corrective actions, two l

,,,i; l subsequent losses cf' recombiner system negative pressure resulted in no l i,i,il appreciable increase in Unit 3 reactor building vent activity levels. l

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